Since I couldn't find anything on here, or googling, I decided I would go ahead and document my adventure of installing a CD player. To be honest, I think it is the exact same as the 08' Impreza (thought about that half way though my install). Tip from SVXdc, remove any CDs from the stock radio! Larger pictures of each image can be found here: Flickr: Iamcuddles' Forester CD Player Set Enjoy, hope it helps

Step 2: (This step may be avoided, just be CAREFUL! Here is the link to avoid this step After Market CD Player Install 09')
Remove passenger side cover to get access to a single screw that hold together the silver dash part and remove the screw:

Be gentle when pulling apart the dash. Try not to pry any plastic piece, instead use both hands. From here, all the pieces are held in by clips.

Step 3:
Remove front dash part. Do not use one hand like I have pictured.

Step 4:
(4) screws hold in the stock CD player. Remove these screws and take out the stock CD player. The (4) plugs pictured from left side to right are; main harness, ground, dunno (see below for more information) and your antenna plug.

...
But since each plug is unique, it's not too hard to tell them apart -- main harness has 20 pins, ground lug has 1 "pin", aux/sub has 8 pins, and the antenna jack is a standard coax Motorola socket....

I don't know what Cuddles did with that wire, but it's a redundant ground. The 20-pin radio harness has another. Only one is needed.

In some other Subarus, this wire attaches to a lug on one of the mounting brackets instead of the rear of the factory radio. So on those cars you could keep it connected that way even with an aftermarket radio.

For Subarus where the ground lug was on the factory radio, if you really wanted to be thorough you could get a male "quick disconnect" terminal, crimp that to a short piece of wire, plug the terminal into the car's ground connector, and attach the other end of the wire to one of the mounting screws on the side of the radio......

The "dunno" harness is the 8-pin connector that has the wires for Aux input. Picture and info in my NASIOC thread here. In some Foresters, that connector also has pins for a line-level subwoofer output.

Your HU will work fine without it connected.

If you would like to connect your car's 3.5mm aux jack to your new HU, you'll need the matching 8-pin connector, wired to either left/right RCA plugs or a 3.5mm stereo plug (whichever your new HU uses for its aux input).

If your Forester has one of the new-style OEM powered subwoofers and your HU has a line-level sub output, you could similarly send the HU's sub out to the OEM sub.....

.....FYI, the center console aux-in runs to the 8-pin secondary connector behind the radio. I found if you buy a second factory radio harness, the 8-pin will actually mate with the middle of the 24-pin connector, no need to tap or cut wires.
I bought a second wiring hardness to add some extra wires so I could tap into the the steering wheel controls.

Step 5:
Remove (4) screws from each side of the CD player so that you can keep and re-use the metal pieces.

Step 6:
Grab a beer, the metra wire harness, your aftermarket CD harness, electrical tape (if you are cheap) or a solder gun. Connect each of the wires to their appropriate color.

Step 7:
Mount the original metal side plates to your after market CD player. I imagine you can either put it on the bottom or top. I chose to put it in on the top part.

Step 8 (if applicable)
Any iPod or USB cables can be routed where ever you chose. I thought going through the glove compartment was pretty easy and the hole is plenty big.

Step 9:
Connect the harnesses and the antenna plug. TEST IT BEFORE GOING ANY FURTHER.

Install the last (4) screws to mount your CD player to the car. Edit- Got the right dash kit now (just follow install instruction included in the kit...should be pretty easy).

Final Step:
Snap together the passenger side dash pieces, screw it in and replace the cover.

The left over screws I put back onto the stock unit so that I could not lose them.

At this point you should have no extra screws laying around (I hate when that happens). Enjoy your new CD player...it sounds soo much better than stock.

Keywords:
2009 , MY09 , CD player , 2010 , MY10 , MYSH

BEST mechanic I know to work on my Subaru. Richmond VA

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... there are two small slits at the bottom of the radio bezzle, small and hidden. Once you find them, you can use a plastic tool, or carefully use a flat head screwdriver to gently pry it off, trying not to scratch any adjacent plastic.

These two slits make it so you don't have to remove the swooping silver piece on the passengers side.

Thanks for the heads up subyeh, I added your post to my walk through. I started to pry stuff, but then I said screw it, I didn't want to scratch anything! Doogle, did you have a premium sound system in it? Can anyone confirm that the XTs are different from the 2.5Xs? hahaha yeah jkop, this was actually one of my few installs that went the fastest and I ran into ZERO problems. Love my subbie

BEST mechanic I know to work on my Subaru. Richmond VA

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The screws that hold the brackets to the sides of the OEM radio are sometimes VERY tight. Place the HU down on something like wood blocks (to protect the brackets and front panel that extend on the opposite side from the side you're working on). Then use a screwdriver that is exactly the right size for the screw, and press it down forcefully while you get each screw unseized.

You can buy a single-DIN pocket (or "cubby"), with or without a door, to fill the empty space below a 1-DIN sized radio.

The "dunno" harness is [definitely] the 8-pin connector that has the wires for Aux input and illumination dimming cancellation [ADDED: illum. pin not present on Foresters]. I may soon have the matching connector available. Picture and info in my NASIOC thread here.

Cuddles — how many wires are there on that plug in your car? Is it 6 out of 8 pin positions?

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go with crutchfield, they give you everything, and i mean everything, from install guides(with pictures) cover pieces and all that jazz i love em!

Crutchfield doesnt have the install guide for the 2009 forester. Also depending on your radio you might require an additional antenna adapter which is not included with purchase. I had to contact them and they are shipping it out separate

My 09 X touring model (1 cd no nav or anything) has a 20 pin connector if i remember correctly from when i added a LOC and a lil amp and 12" sub in mine. I found the pinout for the 08 impreza somewhere to aid me, the wire coloring scheme isnt the same between the 08 impreza and the 09 forester but its same position on the pinout. I need a new deck still but its fine for now till i can get some money together. I found the two slits in the bezel at first look so it was pretty quick.